After performing the mod above my GTP which was stalling out and not re-starting up to three or four times every single afternoon trip into the city and once or twice on the way home in the later evenings completely stopped misbehaving and has never stalled or not started since.
When I originally added the auxiliary fan thermostat to run one fan (the drivers side fan) at high speed it was noisy (people were saying your car is still running lol) and made no difference in failures. When I chose the relay that runs both fans at low speed, however, I immediately noticed that the wait to restart the engine was much, much shorter! This is because the passenger side fan that is by the ICM platform cools it off!
The ICM heat shield lowers the ICM temperature by about 60˚F which is adequate to solve the defect that makes it unreliable and/or inoperable. An asbestos sheet would be much better heat insulation but that material is a serious health hazard!
For the sake of my battery I chose to let the auxiliary button-type thermostat, now located on the ICM heater platform to run both fans on low, activating R12
